What is an L-shaped loft conversion?
L-shaped loft conversions are ideal for Victorian and Edwardian terraced properties where there is a back addition at the rear – usually housing the kitchen in the ground floor and a bathroom above. It means that you have a little bit more area to build over, and can achieve a larger loft conversion.
If you have a rear addition to your terraced home, you can consider an L-shaped loft conversion. The benefits are:
- The maximum cubic meters allowable under UK Permitted Development rules (meaning you probably won’t need planning permission) is 40 cubic metres for a terraced home*.
- Most terraced homes are not able to completely maximise this allowable space with a standard flat-roofed dormer loft conversion.
- By extending your dormer over the rear extension, you end up with more extra space once the conversion is completed.
- Practically this adds about the size of a 2 metre by 2 metre room compared to a standard terraced loft conversion. This can be incorporated into your loft conversion design to include a small study, to fit in a bathroom, a good walk-in-wardrobe or, as one of our customers had, a champagne fridge! Don’t hold back with your imagination or your dreams!
Different designs for an L-shaped loft conversion
In order to keep any loft conversion within Permitted Development regulations, your design must not add more than forty cubic metres to your home. There are various ways to design your L-shaped loft conversion to make the most of this allowable space.
The standard design for this type of terraced loft conversion includes a flat roof dormer across the rear of the main roof, extending round and over part of the rear addition. This would not normally extend all the way to the back of the rear addition, simply due to the need to keep the design within the allowed forty cubic metres.
If you want to extend the roof of the entire rear addition, the main roof dormer would necessarily be smaller, extending only part way across the roof.
A large Velux window can then be added to allow light into the remaining portion of the main roof.
What can I fit into my L-shaped dormer loft conversion?
The answer is – whatever you like! With some terraced loft conversions it can be tricky to fit in an ensuite. However, with an L-shaped conversion this becomes much easier and, as the image at the top of this article shows, you may even find you can fit a full bathroom.
A popular design choice is to add double doors and a juliet balcony to the flat roof dormer over the main rear roof at the rear of the property, with velux windows adding light at the front.
Could I get planning permission for a larger L-shaped loft conversion?
In our experience, most councils do not approve planning permission for larger L-shaped dormer loft conversions. Contacting us to discuss your ideas and your needs. Our experienced designer can help you to create a loft that will increase the value of your home, maximise the available space and move your lifestyle up!
*Note that for detached and semi-detached homes, the volume allowance is 50 cubic metres additional roof space.
**Any previous roof space additions must be included, whether part of your current loft extension plans, or already existing.
You may also find our article on this Bristol Terraced Loft Conversion helpful.
Want to know about other types of loft conversion? We’ve got you covered.
Have your thought about making your loft conversion bathroom a wetroom ? Brilliant for smaller spaces.